Taggant system
AssigneeSpectra Systems Corporation
InventorNabil Lawandy
Life of this patent
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Abstract
An authentication system and associated method including a substrate including one or more doped inclusions disposed in or on the substrate at one or more portions of the substrate such that electromagnetic radiation absorption and reflectance varies between a portion of the substrate in which a doped inclusion is disposed and a portion of the substrate in which no doped inclusion is disposed, and a detector including an electromagnetic radiation source configured to irradiate the substrate with electromagnetic radiation at multiple wavelengths and an imaging system configured to acquire multiple images of the substrate subjected to irradiation.
Claims27
An authentication system, comprising:
- a substrate including one or more doped inclusions disposed in or on the substrate at one or more portions of the substrate such that electromagnetic radiation absorption and reflectance varies between a portion of the substrate in which a doped inclusion is disposed and a portion of the substrate in which no doped inclusion is disposed, wherein the one or more doped inclusions comprise one or more sharp linewidth absorber dopants;
- and
- a detector including:
- an electromagnetic radiation source configured to irradiate the substrate with electromagnetic radiation at multiple wavelengths, and
- an imaging system configured to acquire multiple images of the substrate subjected to irradiation.
A method of authentication, comprising:
- irradiating, with an electromagnetic radiation source of a detector, at multiple wavelengths a substrate including one or more doped inclusions disposed in or on the substrate at one or more portions of the substrate such that electromagnetic radiation absorption and reflectance varies between a portion of the substrate in which a doped inclusion is disposed and a portion of the substrate in which no doped inclusion is disposed, wherein the one or more doped inclusions comprise one or more sharp linewidth absorber dopants;
- acquiring, with an imaging system of the detector, multiple images of the substrate subjected to irradiation at the multiple wavelengths;
- and
- detecting the one or more doped inclusions through an image analysis of the multiple images.
Dependencies are inferred from the claim text.